As the first report of the accident came in, Burton was sitting in his office on the top floor of the building. ___1___, realizing the seriousness of the whole incident, he moved to a ground floor room with a small waiting-room to look ___2___ the mater himself, leaving his second-in-command to take over all other ___3___.

He ___4___ the first witness(证人) almost at once, making sure that everything was done that could be done to put him at ___5___. However, the witness was obviously nervous and Burton took great pains to ___6___ what he said thoroughly, choosing and checking each word ___7___ and taking the man’s statement down himself. The witness had called the ___8___ and he’d waited until the ambulances(救护车) began to arrive, then ___9___ the first police car arrived on the scene he’d been asked to ___10___ to the station which was what he had done. Burton___11___ that regrettably it would be necessary for him to go to court because of the serious nature of the ___12___. More he couldn’t say at present. He’d be ___13___ if the man could keep in touch with the police.

When he had ___14___, Burton put his head in his hands and considered before ___15___ for the next witness. The man couldn’t be ___16___ as a hundred percent witness because he had been behind a wall when the explosion ___17___. But in spite of his nerves, Burton had the impression that he was ___18___, not afraid of relating himself to it and a fairly exact observer.

Well there would be ___19___ descriptions and no doubt all these would be put into place and the whole picture would become clear. He ___20___ his head and pressed the bell on his desk. “Next witness please,” he said.